I have a 2002 Trailblazer and it is time to change the sparks. What kind should I use? Is there an alternative to AC Delco - for example NGK, Champion or Bosch - Problem finding AC Delco where I live. Thanks

 

you will have to get a plug called Iridium it is made by Delphi or AC Delco a regular plug will not work correctly I believe it is the shape of these plugs that fits correctly into the coil also these Iridium are guaranteed to last in excess of 100,000 miles and cost $9 each

 

Vlado welcome to the forum...
I too would recommend the stock spark plug, any other brand is likely to not last as long as the original and any claims of more power or better MPG is pure hype..if a plug alone would improve power and MPG the auto manufactures would already be all over it...


Maintenance Items

Application Part Number

Automatic Transmission Filter Kit GM P/N 24200796

Air Cleaner 4.2L L6 MFI (LL8) AC Delco® Part No. A2014C

Engine Oil Filter 4.2L L6 MFI (LL8) AC Delco® Part No. PF58

Spark Plugs 4.2L L6 MFI (LL8) AC Delco® Part No.41-965

Fuel Filter 4.2L L6 MFI (LL8) AC Delco® Part No. GF831

Windshield Wiper Blades 20.0 inches (50.8 cm)

Back glass Wiper Blade 14.0 inches (35.6 cm)

 

You reopening threads that are over 2 years old.